// Copyright(c) 2019, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// VulkanHpp Samples : InstanceExtensionProperties
//                     Get global extension properties to know what extension are available to enable at CreateInstance
//                     time.

#include "vulkan/vulkan.hpp"

#include <iostream>
#include <sstream>

static char const * AppName    = "InstanceExtensionProperties";
static char const * EngineName = "Vulkan.hpp";

int main( int /*argc*/, char ** /*argv*/ )
{
  try
  {
    /* VULKAN_KEY_START */

    std::vector<vk::ExtensionProperties> extensionProperties = vk::enumerateInstanceExtensionProperties();

    // sort the extensions alphabetically

    std::sort( extensionProperties.begin(),
               extensionProperties.end(),
               []( vk::ExtensionProperties const & a, vk::ExtensionProperties const & b ) {
                 return strcmp( a.extensionName, b.extensionName ) < 0;
               } );

    std::cout << "Instance Extensions:" << std::endl;
    for ( auto const & ep : extensionProperties )
    {
      std::cout << ep.extensionName << ":" << std::endl;
      std::cout << "\tVersion: " << ep.specVersion << std::endl;
      std::cout << std::endl;
    }

    /* VULKAN_KEY_END */
  }
  catch ( vk::SystemError & err )
  {
    std::cout << "vk::SystemError: " << err.what() << std::endl;
    exit( -1 );
  }
  catch ( std::exception & err )
  {
    std::cout << "std::exception: " << err.what() << std::endl;
    exit( -1 );
  }
  catch ( ... )
  {
    std::cout << "unknown error\n";
    exit( -1 );
  }
  return 0;
}
